Dear William,
1. Yes, there is a difference between these two: UL 94 specifies
that for UL5VB it is acceptable to see burn-through (hole) of any plaque
specimen. For 5VA is not acceptable to produce a hole during the testing.
2. The Annex A9 of EN60950 (IEC60950) does not specify the above
mentioned aspect as a CRITERIA for acceptance,(just to do not be "consumed
completely"...) and thus, in my engineering judgement, since the rest of the
criteria are identical, I think that both, 5VA and 5VB will comply with 5V.
Respectfully yours,
Constantin
Constantin Bolintineanu P.Eng.
DIGITAL SECURITY CONTROLS LTD.
3301 LANGSTAFF Road, L4K 4L2
CONCORD, ONTARIO, CANADA
e-mail: [email protected]
telephone: 905 760 3000 ext 2568
www.dscgrp.com
-----Original Message-----
From: William D'Orazio [mailto:[email protected]]
Sent: Thursday, December 21, 2000 10:00 AM
To: EMC Posting (E-mail)
Subject: UL94-5VA & B
Gents,
I came across the following flammability rating UL 95-5VA and UL
94-5VB. Is there a difference between these two rating and which one is
equivalent to the EN60950 classification 5V.
Thanks in advance,
<<...>>
William D'Orazio
CAE Electronics Ltd.
Electrical System Designer
Phone: (514) 341-2000 (X4555)
Fax: (514)340-5552
Email: [email protected]
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